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Electromagnetic fields inhibit endothelin-1 production stimulated by thrombin in endothelial cells.

The Journal of international medical research · 2005 · Mixed · Low evidence

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MixedLow evidencePaper 5162

EMF radiation reduced basal ET-1 levels in human umbilical vein and microvascular endothelial cells but not in bovine or human aortic endothelial cells. EMF radiation inhibited thrombin-stimulated ET-1 production and thrombin-induced ET-1 mRNA expression in a…

Study snapshot

PublicationThe Journal of international medical research · 2005
Study typein_vitro
Reported directionMixed
Evidence ratingLow

Abstract

Electromagnetic field (EMF) radiation has been found to induce arteriolar dilatation, but the mechanism of action remains largely unknown. This study investigated the effect of EMF radiation on the production of endothelin-1 (ET-1), a potent vasoconstrictor, by cultured endothelial cells. EMF radiation reduced ET-1 basal levels in human umbilical vein and microvascular endothelial cells, but failed to reduce ET-1 basal levels in bovine and human aortic endothelial cells. EMF radiation significantly inhibited thrombin-stimulated ET-1 production in all four endothelial cell types in a dose-dependent manner. EMF radiation significantly inhibited thrombin-induced endothelin-1 mRNA expression in all four cell types. The inhibitory effect of EMF radiation on ET-1 production was abolished by the nitric oxide synthase inhibitor NG-monomethyl-L-arginine (10(-3) mol/1). These results demonstrate that EMF radiation modulates ET-1 production in cultured vascular endothelial cells and the inhibitory effect of EMF radiation is, at least partly, mediated through a nitric oxide-related pathway.

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typein_vitro
Effect directionmixed
PopulationNot supplied
Sample sizeNot supplied
ExposureNot supplied
Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

EMF radiation reduced basal ET-1 levels in human umbilical vein and microvascular endothelial cells but not in bovine or human aortic endothelial cells. EMF radiation inhibited thrombin-stimulated ET-1 production and thrombin-induced ET-1 mRNA expression in all four endothelial cell types in a dose-dependent manner; this inhibition was abolished by a nitric oxide synthase inhibitor.

Outcomes measured

  • Endothelin-1 (ET-1) basal production
  • Thrombin-stimulated ET-1 production
  • Endothelin-1 mRNA expression
  • Nitric oxide pathway involvement (via NOS inhibitor NG-monomethyl-L-arginine)

Limitations

  • Exposure characteristics (e.g., frequency, intensity/SAR, duration) not reported in the provided abstract/metadata
  • In vitro cell culture study; findings may not translate to in vivo or clinical outcomes
  • Sample size and experimental replication details not provided in the provided abstract/metadata
View raw extracted JSON
{
  "study_type": "in_vitro",
  "exposure": {
    "band": null,
    "source": null,
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Endothelin-1 (ET-1) basal production",
    "Thrombin-stimulated ET-1 production",
    "Endothelin-1 mRNA expression",
    "Nitric oxide pathway involvement (via NOS inhibitor NG-monomethyl-L-arginine)"
  ],
  "main_findings": "EMF radiation reduced basal ET-1 levels in human umbilical vein and microvascular endothelial cells but not in bovine or human aortic endothelial cells. EMF radiation inhibited thrombin-stimulated ET-1 production and thrombin-induced ET-1 mRNA expression in all four endothelial cell types in a dose-dependent manner; this inhibition was abolished by a nitric oxide synthase inhibitor.",
  "effect_direction": "mixed",
  "limitations": [
    "Exposure characteristics (e.g., frequency, intensity/SAR, duration) not reported in the provided abstract/metadata",
    "In vitro cell culture study; findings may not translate to in vivo or clinical outcomes",
    "Sample size and experimental replication details not provided in the provided abstract/metadata"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "electromagnetic field",
    "EMF radiation",
    "endothelin-1",
    "ET-1",
    "endothelial cells",
    "thrombin",
    "mRNA expression",
    "nitric oxide synthase inhibitor",
    "NG-monomethyl-L-arginine",
    "vasoconstrictor",
    "vasodilation"
  ],
  "suggested_hubs": []
}
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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1177/147323000503300510
PubMed: 16222888

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